luminosity
noun
lu·mi·nos·i·ty
ˌlü-mə-ˈnä-sə-tē 
plural luminosities
1
a
: the quality or state of being luminous
b
: something luminous
2
a
: the relative quantity of light
b
: relative brightness of something
3
: the relative quantity of radiation emitted by a celestial source (such as a star)
Examples of luminosity in a Sentence
the luminosity of the fireflies made for an enchanting nighttime show
Recent Examples on the Web
The best bronzing drops offer a secret-weapon solution, imparting depth and luminosity to your natural skin tone without the risks of sun exposure.
—
Claire Sullivan, Footwear News, 21 June 2025
Made up for the favorites, expect the Miracle Eye Contour Cream, the brand-new Golden Glow Gradual Tan Face Serum, the Golden Glow Gradual Tan, and the Tan Accelerating Lotion prep and add luminosity to the skin for the party season ahead.
—Felicity Carter, Forbes.com, 18 June 2025
Enriched with a brightening serum and vitamin C, the tropical citrus body wash is part of how Tookes’ maintains her skin’s luminosity.
—India Espy-Jones, Essence, 2 June 2025
The energy and luminosity of an ENT boggles the mind.
—Andrew Paul, Popular Science, 4 June 2025
See All Example Sentences for luminosity
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Claire Sullivan, Footwear News, 21 June 2025
Made up for the favorites, expect the Miracle Eye Contour Cream, the brand-new Golden Glow Gradual Tan Face Serum, the Golden Glow Gradual Tan, and the Tan Accelerating Lotion prep and add luminosity to the skin for the party season ahead.
—Felicity Carter, Forbes.com, 18 June 2025
Enriched with a brightening serum and vitamin C, the tropical citrus body wash is part of how Tookes’ maintains her skin’s luminosity.
—India Espy-Jones, Essence, 2 June 2025
The energy and luminosity of an ENT boggles the mind.
—Andrew Paul, Popular Science, 4 June 2025
See All Example Sentences for luminosity
Cite this Entry
“Luminosity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/luminosity. Accessed 14 Jul. 2025.
Copy CitationKids Definition
luminosity
noun
lu·mi·nos·i·ty
ˌlü-mə-ˈnäs-ət-ē
plural luminosities
1
: the quality or state of being luminous : brightness
2
: something luminous
Medical Definition
luminosity
noun
lu·mi·nos·i·ty
ˌlü-mə-ˈnäs-ət-ē
plural luminosities
1
: the quality or state of being luminous
2
a
: the relative quantity of light
b
: the comparative degree to which light of a given wavelength induces the sensation of brightness when perceived
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